This is a topic of some discussion for us at the moment - there are huge operational benefits to using Marketo landing pages for our paid search landing pages. And I know we can control whether we want those pages crawled by Google. The question is, what impact does this have on our overall SEO - if we have highly ranked landing pages hosted on our Marketo subdomain, does any of the benefit of that accrue to our main site? Or does the use of the subdomain keep that from happening.